There are usually 28 in a person’s mouth, so we should listen to the doctor’s ______ to protect(保护)them.
—What’s this _____ English? —It’s a dictionary.A. for B. to C. in
—Does your brother have a basketball? —No, _____ doesn’t.A. she B. he C. it
—Why do you like English? —Because it’s _______.A. boring B. interesting C. difficult
—_________ are these trousers? —They are only $15.A. How many B. How much C. How
—Thanks for your help,Mary! —________. A. Good B. Don’t thank me C. You're welcome